Front

An air-to-air heat pump has many of the same components as an air conditioning system. The major difference is that a heat pump also has a

Back

reversing valve

Front

What is the difference between "demand defrost" and "timed defrost?"

Back

Demand defrost happens only when needed and timed defrost is based on time/temperature.

Front

The thermostat that controls the auxiliary electric heat according to the outdoor temperature is called

Back

outdoor ambient thermostat

Front

The outdoor temperature at which the heat pump provides the same amount of heat as the heat loss of the conditioned space without auxiliary heat is known as

Back

initial balance point

Front

At what temperature is an outdoor ambient thermostat normally set? Options: At 32 degrees Fahrenheit, Slightly above the initial balance point, The same as the indoor thermostat, 15 degrees above the initial balance point

Back

Slightly above the initial balance point

Front

the outdoor coil is frozen solid on a "no heat" service call. The most likely reason is

Back

the outdoor fan is inoperative

Front

in order to determine a heat pump's balance point, you must first calculate

Back

The building's heat load

Front

when a heat pump is used for heating and cooling, the system is sized by the

Back

cooling load

Front

A high efficiency heat pump system designed to function from high to low ambient conditions below 10F, may have?

Back

an auxiliary heat exchanger injected with an ethylene glycol solution

Front

Room thermostats for heat pump should be installed as near to the main return air grill as possible.

Back

as near to the main return air grill as possible